Liu Jiacheng, Liang Fei, Sun Changsheng, Wang Xu, Su Zhiyong, Li Yumao, Luan Peng, Cao Zhiping, Bai Xue, Leng Li
Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture and Rural Affairs, Harbin 150030, China.
Key Laboratory of Animal Genetics, Breeding and Reproduction, Education Department of Heilongjiang Province, Harbin 150030, China.
Animals (Basel). 2025 Jun 24;15(13):1867. doi: 10.3390/ani15131867.
To accelerate breeding progress for egg production traits in Lindian chickens, the genetic parameters for egg production and clutch-related traits in Lindian chickens were evaluated in the present study. Data regarding the age at first egg (AFE), egg number (EN), average clutch length (ACL), and average pause length (APL) were collected from two generations of Lindian chickens based on individual egg production records at 32 weeks of age (32-wk), 43-wk, and 52-wk. The results showed that the AFE of Lindian chickens was 179.3 d of age, with a heritability of 0.35. The heritability was 0.26 for EN32, 0.28 for EN43, and 0.34 for EN52. ACL showed moderate-to-high heritability (h = 0.3-0.54), but APL traits showed low heritability (h = 0.09-0.14). There were high positive genetic and phenotypic correlations for EN in the three periods from the start of laying up to 32-wk, 43-wk, and 52-wk. EN had high negative genetic correlations with AFE (r = -0.47--0.80) and high positive genetic correlations with ACL (r = 0.45-0.81). The correlation between EN and APL was positive for 32-wk and 43-wk, but negative for 52-wk. These results indicated that the egg production of Lindian chickens could be improved by the selection of AFE, early EN, and ACL.
为加快林甸鸡产蛋性状的育种进程，本研究对林甸鸡产蛋及与产蛋窝相关性状的遗传参数进行了评估。基于32周龄（32周）、43周龄和52周龄时的个体产蛋记录，收集了两代林甸鸡的开产日龄（AFE）、产蛋数（EN）、平均产蛋窝长度（ACL）和平均间歇长度（APL）的数据。结果表明，林甸鸡的开产日龄为179.3日龄，遗传力为0.35。32周龄产蛋数（EN32）的遗传力为0.26，43周龄产蛋数（EN43）的遗传力为0.28，52周龄产蛋数（EN52）的遗传力为0.34。ACL表现出中到高的遗传力（h = 0.3 - 0.54），但APL性状表现出低遗传力（h = 0.09 - 0.14）。从开始产蛋到32周、43周和52周这三个时期，产蛋数之间存在高度正遗传和表型相关性。产蛋数与开产日龄呈高度负遗传相关性（r = -0.47--0.80），与平均产蛋窝长度呈高度正遗传相关性（r = 0.45 - 0.81）。32周龄和43周龄时产蛋数与平均间歇长度呈正相关，但52周龄时呈负相关。这些结果表明，通过选择开产日龄、早期产蛋数和平均产蛋窝长度，可以提高林甸鸡的产蛋性能。
